U.S. Widens Role in Battle Against Mexican Drug Cartels

By GINGER THOMPSON
Published: August 6, 2011

WASHINGTON — The United States is expanding its role in Mexico’s bloody fight against drug trafficking organizations, sending new C.I.A. operatives and retired military personnel to the country and considering plans to deploy private security contractors in hopes of turning around a multibillion-dollar effort that so far has shown few results.

The United States is assisting Mexican police forces in conducting wiretaps, running informants and interrogating suspects.

In recent weeks, small numbers of C.I.A. operatives and American civilian military employees have been posted at a Mexican military base, where, for the first time, security officials from both countries work side by side in collecting information about drug cartels and helping plan operations. Officials are also looking into embedding a team of American contractors inside a specially vetted Mexican counternarcotics police unit.

Officials on both sides of the border say the new efforts have been devised to get around Mexican laws that prohibit foreign military and police from operating on its soil, and to prevent advanced American surveillance technology from falling under the control of Mexican security agencies with long histories of corruption.

“A sea change has occurred over the past years in how effective Mexico and U.S. intelligence exchanges have become,â€